Dependent Motion: Sample Problems & References

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The discussion centers on a user struggling with a dependent motion quiz due soon and seeking additional resources for sample problems. They express frustration over their lack of understanding and the need for help. Another participant advises that if the user is having difficulty, they should communicate with their professor to clarify concepts. Additionally, they emphasize the importance of demonstrating effort before receiving assistance from the forum. The conversation highlights the necessity of proactive communication in academic settings.
kring_c14
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I am so sorry if i didnt post any solutions to this test.. i just can't understand it.. this is supposed to be a self study topic...and this quiz is due tommorow...well,, can any of you recommend some site where there are sample problems like this one?? i found some. but i need more reference... any help would be greatly appreciated...lots of thanks!

http://img145.imageshack.us/img145/7648/cci0309200800000os9.th.jpg
 
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kring_c14,

If this is an exam, and you can't understand it, then somewhere the communication process between you and your professor has broken down, and you need to re-establish that contact.

As for us here at PF, we require that you show some evidence of effort before we help you. Please, for your own sake, start by talking to your professor.
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
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